Folding machine



Jan. 14, 1930,

I C. CHRISTIANSE N FOLDING MACHINE Filed April 11, 1928 2 Sheets-Sheet l ugorney s.

Jan. 14, 1930. c. CHRISTIANSEN FOLDING MACHINE Filed April 11. 1928 2 Shgets-Sheet 2 Znventar.--

u torneys.

Fatented Jan. 14, 1939 o ETE.

Application filed April 11,

This invention relates to folding machines for foldingand pressing. down the edges of various kinds of material, and relates particularly to that type of machine shown and described in the application of Andrew R. Ridderstrom, Serial No. 77,593, filed December 24, 1925. The present invention is especially adapted for folding the edges of upper stock of footwear, as for instance for foldingthe edge of a binding' strip previously stitched to the edge of the leather or other material for the shoe upper. p

An object of the present inveiition is to provide an improved machine of the foregoing general type in which improved guiding means is provided and in which the folding may be carried out in an improved manner.

Other objects of this invention will appear in the following description and appended claims, referencebeing had to the drawings forming a part ofthisspecification wherein like reference characters designate corresponding parts in the several views.

Fig. 1 is aside elevation,'partly in se of a machine embodyin my invention. 7

Fig. 2 is an enlarged fragmentary detail view, partly in section,-illustrating an embodlment of the invention.

Fig. 3 is in part a side struction shown in Fig. 2

Before explaining in detail the present invention, and the methodzor mode of operation embodied therein, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of other embodiments and-of being practisef'd'or carried out in various ways.

It is to be understood that ction,

elevation of the conan the phrasefilogy or terminology employed herein is for the purpose of description and not of limitation, and it is not-intended to limit the invention beyond the terms of the several claims hereto appended or'the requirements of the prior art. 1 I V For the purposes of. illustration, I have shown my present invention as applied to a machine constructed in acordance with the above mentioned application ofAndrewR.

certain of the operating parts.

. French cord edge.

a U-shaped spring arm CHBISTIANSEN, OE LYNN, MASSACHUSETTS, ASSIGNOR TO ROTARY MA- GE COMPANY, 01 LYNN, MASSACHUSETTS,

A CORPORATION OF MASSACHUSETTS romaine mncmnn 1928. Serial No. 269,201.

Ridde'rstrom, Serial No. 77,593, although it will be. understood that the invention ma be carried out in various ways.- The mac ine illustrated in Fig. 1 comprises in general a suitable base 20, to which is hinged an upper supporting frame 22 providing a housing for Extending forwardly from the frame 22 is an overhanging arm 23 which is provided with an annular or oblique bore through which extends a rotary shaft 24. Secured to the rear. end of the shaft 24 is a spiral gear 25 meshing with a spiral worm 26 carried at the forward end of a driving shaft 27 which is suitably journalled in the opposite side walls of the frame 5 22. This shaft may be driven by means of thebelt wheel 28 through the medium of suitable clutch mechanism. 2

Secured to the shaft 24 is a rotatable head or upper roll 29. This rotary head is mounted on an axis extending at an angle transverse to the direction of feed. This head 29 carries a series of roller disks 30 which are mount-ed on short shafts (not shown) within the head 29 operated from the shaft 24. These disks 30 are preferably positively'rotated in a direction opposite to the direction of rotation of the head 29 as indicated by the arrows. Each of the disks 30 is provided with an arouate notch 31, and the arrangement of the disks and the construction of the notches thereof are such that during operation the notches will straddle the folded edge of the material, as shown in Fig. 2, without flattening the Beneath'the rotary head'29 is mounted a work supporting roll 32'carried by a support 33, whichvin turn is mounted on a flexible shaft 34, this shaft being connected to the roll 32 so as to rotate the same during the feeding and folding operations. The shaft 34 has an extension 35 carrying a worm .36 operated from theshaft 27 by a worm shaft 37. f

Extending through the. front wall -ofi the housing 22 is a shaft 38. This shaft carries 39. The outer end of the arm 39 is provided with an inclined guide 40 within which is slidingly mounted a retainer bar- 41- controlled by means of a v or disk 45 is rotatably mounted within the spring 42. The lower end of this retainer bar 41 is bifurcated to provide outer and inner forks or arms 43 and 44. A retainer roll chine andoperating parts shown in Fig. 1

is not deemed necessary herein, since this construction in the present instance is substan-' tially the same as the machine illustrated in he foregoing application, Serial No. 77,593, with the exception that a differently constructed work supporting roll 32 is provided,

' and a different type of plow. 55 is provided.

Referring to Figs. 2 and 3, it will be noted "hat the retainer bar 41, which carries the retainer roller 45, is provided with means for bending the leather 48 over the apex 47 of the guide rib 47. In the present instance the fork or arm 44 of the retainer bar has an exension 44 terminating at its lower end in a lip 49. This lip 49 is projectedforwardly to provide a toe portion 50 adapted to engage the portion 48" of the leather or other material which extends across and beyond the guide rib and bend it downwardly over the guide rib 47 as the stock is fed under the retainer.

45 and the projection 49 straddle opposite sides of the apex 47 of the guide rib, and the guide projection 50, cooperating with the disk 45 act to bend or compress the leather into slightly convex form or V-shape, thus holding the material upon the guide rib and forcing the relatively sharp apex 47 of the guide rib into the stitch line 52, maintaining the stock in condition to keep the stitches smiling or exposed. It will be understood that the binding strip 53 is stitched tothe material or leather48 by means of a line of stitching 52. The stitching is preferably loose,'t-hat is with a greater number of stitches per inch than. is customary in using other. types of French cord machines. The galloon or binding strip is first opened out by hand by the operator before introducing the stock in the machine, and the loose stitching enables the stitches to smile readily. The action of the members 50 and 45 in bending the leather over the guide ribresult in keeping the stitches exposed and holding the vrib on the stitch line. The projection 50 presses into the leather as shown in Figs. 2 and 3 at and above the margin of the stitch line I v guiding the stock to the folding retainer roll, 45, and operate at an angle to the line of feed, as in said prior application. The disks 30 are given an orbital movement by means of the rotary head 29, and also have a positive rotary movement in the direction of the arrows in Fig. 2, opposite to the direction of rotation of the head 29, so that during the folding and feeding operation the notches 31 straddle and clear the rib-47.

It will be noted that the disks are each provided with a cam face 30 commencing at the leading point 30 of the notch 31 and terniinating at 30, the remainder of the disk 30 being a true circle. The pressing. action of the disks is accomplished by the cam shaped edges 30. Due to the fact that these'pressing faces or edges are not true circles or concentric with the edges 30", when the disks travel over the curved face of the roller 32 there will be a slight drag 'of the 'cam' 30 resulting in sufficient friction to pull the binding strip tightly around the edge of the leather. This action in conjunction with the ling action of the notches 31 results" I in producing a round French cord.

From the foregoing it will beseen that the i 10f against the face 47 of the guide rib 47, and

retainer disk 45 presses the-material 48 the projecting lip 50 forces the edge of the.

leather as well as the turned under portion 'of the binding strip against the face 47 c of the guide rib. As a result the apex '47 'of space'between the binding strip and the leather and will follow the stitch line so as to guide the stock. The member 49 is provided with a laterally extending bottom face 49 and an end face 49 which provide relatively narrow spaces or troughs between the faces 55 and 55 of the plow for the passage of the binding strip, thus guiding the binding strip to the folding nd feeding disks.

What I .claim is: p

1. In a folding machine, support and retainer member for pressingthework against said support, said retainer'inember comprising a rotatable roll and means for guiding the edge of the work, and means for folding the work.

2. In a folding machine, a work support, a retainer member for pressing the work against said support, said member comprising a rotatable disk downwardly the edge of the -work, and means for folding the work.

3. In a folding machine, a work support, a pro ecting guide engageable with the under and a device for bending the guide rib will be held within the V shaped side of the material, means for bending the edge of the material downwardly over sa d guide, and means for folding a binding strip around the edge of the material.

4. In a folding machine having fold pressin mechanism, a rotatable work supporting ro having an annular guide rib, a retainer comprising a rotatable disk for pressing the material against said rib and also comprising means for bending downwardly the edge of the material over said guide rib.

5. In a folding machine, a work support, a projecting guide engageable with the under side of the material, a member having a retainer disk or'roll engaging the material at one side of said guide, and a device carried by said retainer for engaging the material at the opposite side of said guide.

6. In a folding machine, a work support having a projecting guide engageable with the under side of the material, a retainer comprising a pair of members for engaging the material at opposite sides of said gui e thereby to hold the material in place with relation to the guide, and means for folding the work.

7 In a folding machine, a rotatable work supporting roll having an annular ide rib, a retainer for holding the material in position with relation to said guide rib during the feeding of the material, and comprising a rotatable disk for pressing the material against one side of the rib and a projecting member for bending the material downwardly at the opposite side of the rib, and means for folding the material. 8. In a folding machine for folding a binding strip stitched to a sheet of material, comprising a work sup ort, a guide for guiding the material and strip at the stitch line, means for bending the edge of the material downwardly over said guide, and means for folding the bindin strip.

9. In a olding machine, a work support havin a projecting guide for guiding the material and binding strip at the stitch line, means for bending the edge of the material rdownwardl at one side of said guide, and means for olding the binding strip over the downwardly bent edge of the material.

10. In a folding machine, a work supporting roll having an annular guide rib for guiding the material and binding strip at the stitch line, a mounting carrying a retainer roll for pressing the material against said rib,

' means carried by said mounting for bending downwardly the edge of the material at one side of said rib, and means for folding the binding strip over said guide rib. I,

11. In a folding machine, a work supporting roll having an annular guide rib for guiding the material and binding strip at the stitch line, a mounting carrying a retainer roll for pressing the material against said rib, means carried by said mounting for bending downwardly the edge of the material at one side of said rib, and a series of rotatable disks for folding the binding strip over said guide rib and pressing it against the work roll having an annular guide rib adapted to guide the work at the stitch line, a retainer forv pressing the material against one face of the guide rib, a retainer for pressing the material at the opposite side of the guide rib and means for folding the binding strip around the edge of the material.

13. In a folding machine for folding a binding strip stitched to the edge of a material, com rising a work support having a guide mem er adapted to project into the space between the material and binding strip for guiding the same along the stitch line, means for bending the material over said guide member, and means for folding the binding strip. a

14. In a, folding machine for folding a binding strip stitched to the edge of a material, comprising a work support having a guide member adapted to project into the space between the material and binding strip for guiding the same along the stitch line, means for bending the material over said ide member, and a series of overlapping rotatable disks having an orbital movement across the stitch line for feeding and folding the work.

15. In a folding machine for folding a binding strip stitched to the edge of a material, comprising a work support having a guide for guiding the work at the stitch line, a plow, a member for bending the material over said guide and also providing guide passages between itself and the plow for guiding the binding strip, and means for feeding the work.

In testimony whereof I aifix my signature.

CHRISTIAN CHRISTIANSEN. 

